<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
			var str = "abc";
			var num = 111;
			var boo = true;
			var aaa;
			var bbb = null;
			var arr = [];
			
			function fn(){
				alert(1);
				return 111;
			}
			console.log(typeof str);
			console.log(typeof num);
			console.log(typeof boo);
			console.log(typeof aaa);
			console.log(typeof bbb);
			console.log(typeof arr);
			console.log(typeof fn);
			console.log(typeof fn());
			
		</script>
	</body>
</html>
